20161114-drupal-twig-format-date.twig

{% set timestamp = node.field_event_time.value|date('U') %}
<article{{ attributes }}>

  {% if label %}
    <header>
      <h1>{{ label }}</h1>
      <h2>{{ timestamp|format_date('museum_date') }}
    </header>
  {% endif %}

  <section class="contents">
    <p>
      {{ content.field_event_type }}<br />
      <span class="label">Time</span>: {{ timestamp|format_date('museum_time') }}
      <span class="label">Location</span>: {{ content.field_event_place }}<br />
    </p>
    {{ content }}
  </section>

</article>